Filter



J y 1929. N. SMITH 1.720.384

FILTER Filed Sept. 28, 1928 Patented July 9,1929.

' UNITED STATES NORMAN -SKI'1E, OF COLORADO SPBIN GS,- COLORADO.

. FILT ER.

Application filed September 28, 1928. Serial lio. 809,058.

M invention relates to filters, but more specifically to that characterof filters adapted to the dry cleaning business.

An object of my invention is to provide a filter which will successfullypass a greater volume of cleaning liquid per given cubic filter spacethan has hitherto beendeemed possible.

Another ob'ect of my invention is to provide a filter of few parts,simply constructed, easily assembled and dissasembled, and withparticular reference to high efiiciency and positive action.

1W invention will be more readily understoo when the specification andclaims are read in the light of the accompanying drawing,- in whichFigure 1 is a perspective view of a suitable container for housing myinvention. F 1g. 2 is a cross-sectional view of the container or housinwith the filtering unit as fitted therein. Fig. 3 is a plan view of thefiltering sack element of the filtering unit. Fig. i'is an edge view ofthe filtering sack. Fig. 5 is an elevation of a suitable nipple adaptedto connect the filtering element or sack to the source of solutionsupply. Fig. 6 is a horizontal sectional view of. a filter housing witha single filter unit in position, and illustrating means for firmlyretaining the filter unit against one end of the filter housing. Fig. 7is an end elevational view of the removable side of the filter unit.Fig. 8 is a broken lon itudinal side elevational view of a closure orthe open end of the filter sack. Fig. 9 is an end view of the sackclosure.

Referring more in detail to the accompanying drawing, the numeral 1indicates a suitable housing for the filter unit of this invention. 2indicates a woven wire, expanded metal or other pervious material,spirally formed supporting element. 3 indicates a fabric filter sack. 4indicates a nipple adapted to connect filter sack 3 throu h casing 1with the source of solution supply. 5 indicates a nut adapted tosecurely clamp the filter sack 3 to the casin 1. 6 indicates suitablewashers for effecting a solution tight joint between the filter sack andthe casing. 7 indicates a detachable closure element for the open endofthe filter sack. 8 indicates the corded and reinforced open end of thefilter sack 3. 9 indicates an extension cord adapted to facilitate theplacement or re- 55 moral of the element 7. 10 indicates loops casing 1.

construction than would be on the closed end of. the filter sack 3adapted to hang the sack in a vertical position to facilitate drying. 11indicates a hole in one side of the filter sack 3, adapted .to receivethe nipple 4. 12 indicates reinforcement for the hole 11. 13 indicates aslot in the element 7. 14 indicates the detachable end of the filtersack supporting element 2. 15 indicates a hole in element 14 adapted topass over element 7. 16 indicates a reinforcement for the outer edge ofelement/14. 17 indicates a reinforcement for the hole 15 in the element14. 18 indicates inlet holes in the 19' indicates an outlet hole in thebottom of the housing 1. 20 indicates means for retaining the filterunit securely against one end of the filterhousing 1. 21 indicatesindicates a smaller slotted tube within the larger slotted tube 7, thetwo tubes bein rigidly secured together to form a more rigid possiblewith a single tube.

After spending much time, thought, and money in an effort to provideadequate and efficiently practical filtering means from commercial aparatus; I decided that a step forward must he made if successfulfiltering was to be obtained in my business, (the dry cleaningbusiness). I therefore, proceeded to evolve something which would proveadethe non-removable end of the element 2. 22 V quate, this inventionbeing the culmination of my efforts.

Constructional details are, a filter sack, 3 in'the drawings, ofsuitable material for the purpose. This filter sack is relatively longcompared to its breadth, and comparatively thin compared to its breadth.One end of this sack is permanently closed. A hole 11 near the closedend is provided for nipple 4; this hole is to be amply reinforced asindicated at 12. The closed end may also be reinforced by cording ortaping as indicated in the drawings. The open end is corded or otherwisereinforced as indicated at 8. This reinforcement may be extended to forma loop at one side and an extension at the other side as indicated at 9.This loop and extension 4 wider than the filter sack 3, isrolled in aspiral having the desired number of convolutions, as indicated in Fig.2. A side or end element of the same material as element 2, as indicatedin Fig. 7, element 14 is rigidly secured to one edge of element'2. AdllPllcate of element 14 is rovided to be detachably secured to the oter edge of element 2. The unit built .up from elements 2, and 14 I terma cage. This cage is provided to support and retain filter sack 3 in itsproper and safe position.

The detachable element 14 is securely held in position as indicated inFig. 6, by element -20, or, in the event that the container 1 is of theproper size to hold the com leted unit,

7 the element 14 would be retained etween the headsof the element 1.Obviously, a pluralit of filter units may be operated in a sing econtainer.

For closing the open end of the filter sack 3, a slotted element 7 isprovided. This element may be constructed as indicated in the drawingsor it may be constructed from a suitable tube having a cross section'ofsuflicient proportions to rovide the required rigidity. This slott"element 7' may be bevelled as indicated at 13.

A nipple such as is indicated in Fig. 5 is provided to retain the filtersack and rovide a solution roof connection between t e filter sack and te casin 1. This nipple also provides means for introducing solution mtothe filter sack.

Assembly is made as follows: The hardware cloth element 2 may be set onits side, the o 11 end of the filter sack havin been close by theelement 7 this end and e ement 7 is placed in the center as indicated inFig. 2, the filter sack being placed between the spiral convolutions ofelement 2, and carried around to the outer end of element 2. The detachable end 14 may then be laced in position and the whole unit placein container 1. The nipple 4, is then assed through one of the inletholes 18 of t e container 1, as indicated in Fig. 2, a packin washer-6being then placed in position an the nut 5 set up to form a solutiontight joint. Should the filter container be longer than the filter unit,

. an element 20 may be provided so that when 'suppo of solution perminute. This filterhas been' that itmay become thoroughly dry whenpractically all accumulations may be shaken out, after which it maybe'washed in any desired manner.

While I have illustrated and described a preferred assembly constructionof my inventionas ap lied to my particular business, I-

do not wis to be limited thereby, but to be limited only in so far asthe prior art may disclose anticipations.

What I claim as my invention is:

1. A filter of the character described oomrising a rigid and permanentlyformed liardware cloth ca e, said hardware cloth cage bein compose of acentral open ended spiral of ardware cloth, a hardware cloth sidepermanentl secured to one edge of said spiral, another iardw'areclothside adapted to. be-detachably secured llOrtl le ptherside of saidspiral, a filter. fabric sack positioned within the convolutions 'qfsaid preformed spiral, said filter fabric sack being supported by saidhardware cloth cage.

2. A. filter of the character described comprising a permanently formedexpanded metal cage, said explanded metal cage being composed of a cetral open ended spiral of expanded meta I an expanded metal sidepermanently see red to one edge of said spiral, and a removable expandedmetal side adapted to be detachabl secured to the other edge of saidspiral, a; ter fabric sack positioned within the convolutions of said'pi'eformed s iral, said filter fabric sack bein rted and retaified inexpanded metal cage. v

position by 3. A filter of the character eomprising a ermanently formedhardware cloth cage, sai cage hav' an internal spirally arranged elementwi spiral arran ement supporting a liquid meable filteiin ba positionedbetween having an inlet open ng and nipple near V the spaced coii'volu-Y tions secured against the movement,

iis

. the container head is set tight, the filter 'unit closed end,'andhavinga mouth attire-other will be securely and tightly positioned endwith detaehahle mouth the container 1. Connection is then. made 4.Afilterco 'risingaliguid from the solution supply to the nipple 4, andhaving inlet ,an mean angels an outlet-connectlon made from opening 19ing, a pe' ora v i gage to any desired pjxa'rti'of the system. and a' iandfa hag'nf In operation t is filter unit is placedjin a] permeable vegn the coils. solution cireuitin the usual-manner. .Ihave' 'ot the cagethe. had in constant operation in my plant'for a beingi provided wi onepermanently it period of many months a filter unit, as illns trated anddescribed in this specification, oc-

' cupying a. cubic sp)ace of approximately one and one uarter on ie feet(1.25 cu. ft.) .which so y passes approximately 25 gallons a. casinghaving an and 130 entire area within the cas' a permanently preformedreticulated spiral cage proportioned substantially to oecupythesurroundin the cage, a filtering sack .spi ly arran between theconvolutions of the cage, a feed nipple forvthe sack pro'ecting throughthe casing inlet, the liquid tering through the sack entering the casingand escaping through the casing outlet, a permanent reticulated closurefor one end of the cage and a removable closure for the other endthereof.

6, Filtering apparatus comprising a casreformed ri 'd spiral ca e ofreticulate material, a tering sacko a length to fillthe spaces betweenthe convolutions of the cage, said ca e and sack occupying suba stantialy one=ha f of theinterior of the casa in" and a s acer in the casin enged with ticula the ca an adjacent end wa 0 he casing to hol the cagepositioned therein.

7. Filtering ap aratus comprising a casing, a reforme ri id spiral ca eof rematerial, a ifitering sack o a length to fill the spaces betweenthe convolutions of the case, said ca and sack occupying substanti 1yone-ha f of the interior of the easing, a spaoerin the casipg engagedwith the cage and adjacent end wall of the casing to ho d the cagepositioned therein, and said casing and cage being relativelyproportioned whereby the casin may hold one or two cages and sacks andfie retained against relative movements when the material to be filteredis flowed into the sacks under pressure. a

8. A filter of the characterdescribed comprising a rigid and permanentlyformed ardware cloth ca c, said hardware cloth cage being compose of acentral open ended spiral of hardware cloth, a hardware cloth sidepermanentl secured to'o'ne edge of said spiral, another ardware clothside ada ted to be detachably secured to the other si e of said spiral,a filter fabric sack positioned within the convolutions of saidpreformed spiral, said filter fabric sack being supported by saidhardware cloth cage, a casing into which the assembled ca e and sack areremovably positioned, an a removable wall for the casin to close theentrance opening for the assem led cageand sack.

In testimony whereof I my signature.

NORMAN? SMITH;

